Define "plans". I have full sets of the
schematics for the units in my
collection (as I suspect many do), but if you are talking about the
mechanical drawings for things like the case, boards, etc., I am not awar
of those ever being made available.
The case was a standard box available at the time. Some of the inside
brackets were custom as were the layouts. I've never seen a full printset,
and I wonder if there really was.
Allison